Hello, I just installed back Windows 8 and got a boot speed problem, i have found other topics about that, and ran Performance Analyzer. I noticed a very very long time in Pre session, but I don't know where to find more informations, maybe one of you guys can look at my files and tell me where is the problem ? Here are the url to the files : - XML summary : http://online-legion.com/jayce/summary_boot.zip - Full etl file ziped : http://online-legion.com/jayce/boot_BASE+CSWITCH+DRIVERS+POWER_1.zip (full ETL file is still uploading, and will finish in about 5 minutes) Thanks in advance for your time and help, Best regards, Jayce